Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20914916m&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #149.16; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of a comprehensive study of the multiwavelength properties of radio-loud quasars (RLQs). Utilizing data from recent large-scale radio (FIRST) and optical (SDSS) surveys, we have amassed a sample of over 400 RLQs with serendipitous Chandra, XMM-Newton, or ROSAT X-ray coverage, of which >80% are detected in the 0.5-2 keV band. These RLQs span greater than five orders of magnitude in luminosity and extend to high redshifts (21% have z>2) and radio-loudness (17% have log R*>3) their g-i colors as a function of redshift are similar to those of SDSS quasars in general. We supplement this primary sample with additional RLQs lying within the Chandra Deep Fields in order to extend our coverage of the l-z plane to lower luminosities. We confirm the tendency for UV-luminous RLQs to have steeper optical-to-X-ray spectral slopes and examine additional correlations involving redshift, radio-loudness, and radio morphology and spectral slope. These calculations are useful for evaluating the dominant source of X-ray emission in RLQs and for characterizing the evolution of RLQs.
Brandt Niel
Miller Brendan P.
Schneider David P.
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